Trimming-machine



J; FAUSS'EL TRIMMING MACHINE.

APPLICATION FILED NOV. 30. 1,917

1 ,350, 305, Patented Aug. 24, 1920.

2 SHEETS-SHEET l.

J. FAU S SE.

TRIMMING MACHINE.

APPLICATION FILED NOV. 30 19H- Patented Aug. 24, 1920.

2 SHEETSSHEET 2.

UNITED STATES PATENT oFFlcE.

JOS PH rA ssE, or eRocKroN, Mns sAc s T'rs, assrenoa To UNITED siioEMACHINERY CORPORATION, or rArEEsoN, NEW JERSEY, A CORPORATION OF NEWJERSEY.

TRIMMiNG-MACHinE. r

Speeification of Letters Patent. Patented Aug, 24, 1920.

Application filed November 30, 1917. Serial No. 204,640.

This invention relates to machines for op erating on shoes and, inparticular, to machines for trimming the edges of shoes. It is hereinshown as embodied in a machine for trimming the edge of an insole afterthe insole is attached to a last, of'the' type shown in the patents toKeyes No. 1,076,431, Oct. 21, 1913 and No. 1,130,742, March 9,1915,

The insole channeling operation frequently causes an appreciableelongation of the insole. The inferior material of which it is oftenmade and the fact that it is channeled while in temper contribute to thepro duction of this effect, as a consequence of which the insole failsto fit the last when applied to it. It has become the practice,therefore, to apply the insole to the last in such manner as to registerwith it at the toe tip, and to trim off the surplus at the end of theheel.

A difliculty also arises due to the faulty shaping or to the changing inshape of the insole after its initial shaping, it being found that it isfrequently too fat or wide in the shank and heel breast portions. Thismakes it desirable to trim all around the heel, instead of merely at theend thereof. I

In machines used for this purpose prior to the present invention, thelast with the insole tacked on it was supported on a jack and presentedto a revolving cutter, the last resting against a gage as it was turnedaround on its thimble axis to present the heel-periphery of the insoleto the cutter. lVhen trimming insoles which were fat" in the shank, itwas found that the cutter left an abrupt concavity with a sharp terminalcorner where it stopped trimming the shank near its rear end. Thisterminal corner between the concavity and the shank edge had tobetrimmed by hand to avoid causing a hump in the upper of the com pletedshoe near the heel'breast.

An object of the present invention is the correction of the difiicultydescribed.

An important feature of the invention is a fulcrum about which the workmay turn to draw the operating means gradually out of the work at theend of the operation to avoid leaving a lack'of smoothness in the workat the end of the treated portion.

Another feature of the invention is a gage for positioning the lateralsurface of the last constructed and arranged to engage the heel breastportion of the last as the cutter engages the corresponding portion ofthe insole and to act as a fulcrum on whichthe last may swing toseparate the insole and cutter. In the embodiment shown, the gage iselongated along the cutter periphery, serving to position the lastduring the entire trimming operation, and its end serves as the fulcrum.I

This position of the fulcrum point enables the portion of the insole incontact with the cutter in advance of the finishing point 'of cut tomove toward the cutter as the work as a whole swings awayfrom it, thuscutting off the troublesome corner above mentioned. Preferably thefulcrum point will be placed very near the finishing point of cut sothat'the trimmed portion of the insole and the portion in contact withthe cutter will swing in opposite directions around it, and an importantfeature of the invention resides in a fulcrum the swinging of the workas a whole around which will move a part of the work toward theoperating means before it moves it away,thus cutting off the troublesomecorner alluded to above. In the preferred embodiment of the machine therotation of the last is a compound one, com-- prising the movementalready discussed, and also a rotation about a supporting pin'which isconstrained to move in an arc of long radius. This movement tends todraw the corner tangentially across the cutter, and assists in theproduction of thedesired effect, affording some latitude in the locationof the fulcrum point.

These and other features of the invention comprising certainarrangements 0 and combinations of parts will be understood from thefollowing description of a preferred embodiment of the invention,selected for purposes of illustration and shown in the accompanymgdrawings in which,

' usual shield S.

Figure 1 is an end view in elevation of an insole heel seat trimmingmachine, in which the present invention is embodied;

Fig. 2 is a plan view of the cutter and adjacent portions of theillustrated machine showing the manner in which the work is presentedfor treatment. 1

Fig. 3 illustrates diagrammatically the advantages secured by myinvention, and

Fig. 4 is a full size detail illustrating the action of my novel gage.

The machine illustrated comprises a frame 2 having bearings for a rotaryshaft 4 which carries a toothed cutter 6 and the Positioned at the endof the cutter is a guide member 10 constructed for engagement with thelateral surface of a last (Fig. 2) adjacentto the edge of the heel seatto guide the last in its turning movement during the operation oftrimming around the edge of the heel portion of the insole 11. Thisguide member has a lip 12 projecting between the bottom of the last andthe insole for the purpose of positioning the last axially of the cutterand supporting the insole out of contact with the last adjacent to thepoint of operation of the cutter, as well as preventing any possibleengagement of the cutter with the last, all as more fully explained inthe patents above mentioned. The guide member 10 is mounted 'adjustablyin a support 14 which is pivoted to the frame 2 at 16 to permit themember to be swung away from the cutter when it is desired to remove thecutter from its shaft.

Secured upon one side of the lower portion of the frame 2 is a bracket30 upon which the work support of the machine is mounted. This bracketis provided with a bearing 32 for the reception of a stem 34 whichprojects from a block not shown bearing against the right end of thebearing 32 as seen in Fig. 1. Projecting from the block at right anglesto the stem 34 is a stem 40 which provides a bearing for the upwardlyextending arm 42 of the work support. Mounted upon the upper end of thearm 42 is a head 44 having a stem 46 which engages in a bore in anoffset portion of the army so that the head may turn in a planetransverse to the arm.

Secured in a bore in the head 44 is a spindle 56 the forward end portionof which is arranged to enter the last pin socket of a last, and a clampmember 82, operated by a lever 104 on the head 44 holds theheel portionof the insole in position on the last. Fora fuller description of thework holding mechanism reference may be made to the patent to Brown andMacleod No. 1,295,964 granted March 4, 1919, which shows and fullydescribes the work holding mechanism used. in the commercial machineembodying my invention.

hen it is desired to trim an insole attached to a last the operatormounts the last on the spindle 56, clamps the heel portion of the insoleto it by the member 82, and presents preferably its end portion to thecutter. The lip 12 is placed between the last and the insole 11 and thelateral edge of the last is rested against the side of the plate or gage10, as shown in Fig. 2. The operator then turns the last up and down soas to run the cutter around the heel portion of the insole. lVhen theinsole is too fat in the shank, the stopping of the operation at theheel breast portion, by which term I'mean generally the locality nearthe heel breast, both in front of and behind it, leaves a concave gouge108 with a projecting cor ner Z) in the edge between the trimmed anduntrimmed portions of the edge (Fig. 3 on the right) and it is to thecorrection of this diflicnlty that my invention is directed.

The gage 10, as shown by Figure 4, has an elongated working surfaceincluding a comparatively straight part 110 for engaging the back of theheel of the last, and convex shoulders 112 and 114 for engaging thesides of the heel. The edges 116 and 118 diverge or recede to provideclearance for the ball portion of the last during the latter stages ofthe insole trimming operation. Although the remote portions of theshoulders are nearer the axis of the cutter than the part 110 is, thisrelation does not result in deeper trimming at the sidesthan at the backof the heel, because the heels of lasts are undercut at the front of thesides more than at the back, and the gage traverses the wide or bulgingportions of the last. The gage, therefore, enables the cutter to followthe edge of the'heelseat of the last until it reaches nearly'the frontof the heelseat, whereupon the last rocks on the shoulders one at a timewhile advancing longitudinally and thereby retracts the insole graduallyfrom the cutter. ders 112 and 114 are located opposite the points atwhich the cutter contacts with the heel breast portion of the insole.lVhen the last is in the Fig. 2 position it contacts with the gage atthe point midway between 112 and 114. As the toe of the last is turneddownward the point of contact moves toward the heel breast part of thelast and ultimately toward the shoulder 112 on the gage, reaching thatshoulder at the time the cutter reaches the heel breast portion of theinsole. Further movement of the last rocks it on the shoulder 112 as ona fulcrum The shouland also draws it lon itudinall 7 alon the cutterperiphery owing to the fact that the last is pivoted at the end of theswinging arm 42,'which is now swinging away rom swun exclusivel I about112 as center and b I 7 superfluous material due to the fatness of" theinsole is shown at a b 0. The dash lines show a later position of thesame parts, the

superfluous area being now reduced to a b" 0. The dotted lines show theconclusion of the operation, the superfluous material being reduced toa" b c, an amount which causes no trouble; see Fig. 3 on the left. Theother side of the insole is trimmed in exactlythe same way, by trimmingthe toe upward about the point 114-. The portion Z) c is the portion incontact with the cutter, and the point 0 may be called the point offinishingcut. The. remainder of the portion 6 a may be called theportion of roughing out.

In Fig. no attempt has been made to show, in accordance with actualrelations, that the insole lies back of the lip 12. 'The figure is to beregarded as a diagram.

The situation of the point 112 is of great importance. If the last weremerely'swung about the pivot 40 of the arm 42 to pull the work away fromthe cutter, an abrupt concavity as at 108 would be the result. The samewould be true if the last were rotated about a point remote from thepoint of cut, as at 126. But by rocking the last about a point close tothe point of cut, and preferably on the same side of the portion ofroughing cut as the point of finishing cut, the corner I) is initiallymoved into the cutter at the same time that the heel of the insoleswings away from it (Fig. 4:). If the point r: and thepomt 112 are onthe same side of the point 7), the point I) will rotate directly intothe cutter as the end of the heel turns away from it. The corner I) istherefore trimmed off beforethe insole has been swung entirely free ofthe cutter, leaving the insole in the condition shown on the left inFig. 3. This effect is also due in part to the fact that the spindle 56moves in an are 120 of long radius, and consequently draws the insoletangentially along the cutter periphery as it swings out. It istherefore not necessary that the point 1.12 and the point 0 be on thesame side of b, or that the point '112 be between the points Z) and 0,since the tangential drag of the in sole while swinging about any point,near to the projection at 7) will cut off the projection, if the point112 is sufliciently near 6.

It will be seen by reason of the arrangement of the rods or spindles 3%and a0 the work support is afforded. a substantially universal swingingmovement to facilitate the presentation of the work to the machine.

Having thus described my invention, what I claim'as new and desire tosecure by Letters Patent of the United States is 1. In a machine fortrimming an insole attached to a last, a cutter, and a fulcrum arrangedadjacent to the working point of the cutter to contact with the side ofthe heel of the last to limit the penetration of the cutter, at the sideof the'heel seat portion of the insole, the fulcrum being effective toshift the point of cut gradually toward the edge of the work during thelatter stages of the operation, whereby a smooth edge is produced. I

2. In a machinefor trimming an insole attached to a last, a cutter, anda fulcrum having a curved last-engaging surface arranged to contact withthe side of the heel of the last adjacent to the point of operation ofthe cutter to limit the penetration of the cutter, said surface beingcurved more than the periphery of the cutter and being effective toshift the point of cut gradually toward the edge of the work inconsequence of rocking the heel of the last thereon during the latterstages of the op eration, whereby a smooth edge is procluced.

In a machine for trimming an insole attached to a last, a cutter, and agage in- Y which to position successively the back and.

sides of the last as the latter is moved to present different portionsof the insole to the cutter, said gage having an elongated workingsurface terminating in a relatively abrupt convex shoulder arranged tobear .on the side of the heel of the last to separate the cutter and theinsole.

5. In a machine for trimming an insole attached to a last, a cutter, anda gage upon which to position the lateral surface of the last as thelatter is moved to present different portions of the insole to theaction of.

the cutter, the end of the gage being arranged to contact with the lastsurface simultaneously with the engagement of the cutter-with the heelbreast portion of the insole, and to permit the rotation of the lastupon it to throw the heel breast portion of the insole away from thecutter.

6. In a machine for trimming an insole at tached to a last, a cutter,and a gage con structed and arranged to engage the last edge to limitthe penetration of the cutter, the end of the gage being arranged tocontact with the last at the heel breast portion as the cutterapproaches this portion of the insole, and to serve as a fulcrum aboutwhich the last may be rotated to lead the point of cut out to the edgeof the insole.

7. In a machine for trimming an insole attached to a last, a cutter, anda gage comprising a plate arranged to separate the insole from the lastbottom and to support it at the point of cut, and a boss on the platearranged to contact with the lateral surface of the last to limit thedepth of cut, said boss extending along a course adjacent to theeffective are of the cutter and terminating at a pointopposite the rearend of the shank of the last when the cutter is trimming up to the heelbreast portion of the insole so that the last may rest on and slide overintermediate points of the boss as the cutter works from the back of theinsole toward the heel breast portion, and may then swing on the end ofthe boss as a fulcrum to lead the cutter out of the insole.

8. In a machine for trimming an insole attached to a last, a gagearranged for rolling and sliding contact with the last at a pointsubstantially opposite the point of operation on the insole as it movesaround the sharply curved portion of the heel periphery and shaped tocarry its point of contact with the last to the end of the gage, as thepoint of contact moves along the fiat part of the heel periphery, sothat the last may then pivot on the end of the gage.

9. In a machine for trimming an insole attached to a last, a cutter, anda gage for engaging the last edge to limit the penetration of the cutterconstructed and arranged so that the point of contact of last and gagemoves to the end of the gage as .the last is rotated to carry the cutteraround the insole, reaching the end of the gage simultaneously with thearrival of the cutter at the heel breast portion of the insole, andproviding clearance beyond its end for the last to rotate to draw theinsole away from the cutter.

10. In a machine for trimming an insole attached to a last, a cutter,and a gage .arranged for pivotal movement of the last about it while thecutter is trimming the heel breast portion of the insole, the and thepoint of finishing out being located on the same side of the portion ofthe insole which is in contact with the cutter.

11. In a machine for trimming an insole attached to a last, a cutter,and a gage for engaging the last edge to limit the penetration of thecutter as the last is moved to carry the cutter around the insole,constructed and arranged to carry its point of contact with the lastcontinuously along the last until the cutter reaches the heel breastportion of the insole and then to keep its point of contact with thelast in the neighborhood of its heel breast portion while the last isrotated about it to carry the insole away from the cutter.

12. In a machine for trimming an insole attached to a last, a cutter,and a gage for engaging the last-edge to limit the penetration of thecutter as the last is moved to carry the cutter around the insole, saidgage having two shoulders constructed and arranged to engagerespectively the right and left sides of the heel of the last when thecutter is in contact with the corresponding tour flatter than that ofthe cutter and having its end opposite the position assumed by the heelbreast portion of the insole when the cutter is engaging that portion.

14:. In a machine for trimming an insole attached toa last, a cutter,and a gage for engaging the last edge to limit the penetration of thecutter as the last is moved to carry the cutter around the insole,having a peripheral contour flatter than that of the cutter and havingits end opposite and inside the position assumed. by the heel breastportion of the insole when the cutter is engaging that portion.

15. In a machine for trimming an insole attached to a last, a cutter, asupport carrying the last at its upper end arranged to swing about apoint whose distance from the cutter is great as compared with themovement of its upper end, and a gage for en- 1 gaging the last edge tolimit the penetration of the cutter and having its end opposite thepoint of contact of the cutter and the heel breast portion of theinsole, so that swinging the last around the end of the gage willinitially throw the extreme point of the insole engaged by the cuttertoward the cutter and draw it along the cutter.

16. In a machine for trimming an insole attached to a last, a cutter,and a gage for engaging the last edge to limit the penetration of thecutter and having a portion opposite the point of contact of the cutterand the heel breast portion of the insole, con structed and arranged topermit swinging the last around this portion of the gage in such mannerthat such swinging movement willinitially throw the extreme point of theinsole engaged by the cutter toward the cutter.

17. In a machine for trimming an insole attached to a last, a cutter,and a gage having separated convexshoulders arranged to traverse thesides of the heel of the last,

respectively and in turn, to limit the penetration of the cutter nearthe front of the heelseat portion of the insole, and having a relativelystraight last engaging portion connecting said shoulders to traverse theback part of the heel.

18. In a machine for trimming an insole attached to a last, a cutter,last-sustaining means having a definite path of movement toward and fromthe cutter, the last being capable of pivotal motion relatively to saidmeans, and a gage arranged to co-act with the side of the heel of thelast to guide the Work relatively to the cutter While the latter isoperating on the corresponding portion of the insole, said gage and saidmeans, conjointly, being arranged to determine a compound motion of thelast to retract the side of the heelseat portion of the insole graduallyfrom the cutter.

19. In a machine for trimming an insole attached to a last, a cutter,and a gage having an elongated surface arranged to traverse the back andsides of the heel of the last to guide the insole relatively to thecutter,

saidsurface including separate curved Working portions and a relativelystraight WOIk ing portion connecting them.

20. Ina machine for trimming an insole attached to a last, a cutter, anda gage having an elongated surface arranged to traverse the back andsides of the last to guide the insole relatively to the cutter, saidsurface including separate curved Working portions of greater curvaturethan the effective are of the cutter, and a'relatively straight portionconnecting said curved portions.

21. In a machine for trimming an insole attached to a last, a cutter,and a gage to limit the penetration of the cutter into the insole, saidgage including separated convex portions arranged to traverse the sidesof the heel of the last While the cutter is acting on the sides of theheelseat portion of the insole, said convex portions being effective toseparate the insole gradually from the cutter.

In testimony whereof I have signed my 7

